structured-haskell-mode

There is a really great mode [0] for haskell that does the same thing as hl-sexp-mode. Oh and did I mention it fully supports structured editing? These kind of modes really make me question why programs are still written in text instead of ADTs... We don't need to run lexers and parsers to do our syntax highlighting and other fancy stuff... it would be awesome. [0] https://github.com/chrisdone/structured-haskell-mode

Emacs's structured editing, in the style of paredit[1], sounds very similar to a text-based version of syntax-directed editing (SDE). Designed for Lisp and S-expressions, it's a system that lets you edit and navigate around nested expressions at a syntactic rather than textual language. As you type, the correct level of nesting is maintained and there are commands for moving and editing code in terms of s-expressions rather than characters. In practice, it's very easy to start using and very powerful... but requires using Lisp. It'll seem odd if you're not regularly a Lisp user. Happily, this idea can generalize well enough to distinctly non-Lisp languages. Structured Haskell mode[2] does this for Haskell, which has a less regular and sparser syntax than s-expressions. The documentation has a bunch of handy animations showing the various

Actually, you can have paredit-style structured editing for whatever languages you want to support. For example, there is a pretty capable structured editing mode for Haskell[1], which has a syntax significantly less regular than s-expressions. (On the other hand, it's still more regular than most languages...) [1]: https://github.com/chrisdone/structured-haskell-mode

Have you tried structured-haskell-mode[1]? There are video demonstrations here[2]. [1]: https://github.com/chrisdone/structured-haskell-mode [2]: https://www.youtube.com/playlist?list=PLlzKKtH5TyE-R-k86na3b...